function Gem(row, col, color) {
    this.Row = row;
    this.Col = col;
    this.Color = color;
    this.toRemove = false;
}

Gem.prototype.init = function () {
    var el = document.createElement("div");
    el.classList.add("gem");
    el.classList.add("gem-" + GemColor.getKey(this.Color).toLowerCase());
    return el;
};